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나노입자 연구단
나노입자 연구단
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Highly Stable Iron- and Manganese-Based Cathodes for Long-Lasting Sodium Rechargeable Batteries

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Title
Highly Stable Iron- and Manganese-Based Cathodes for Long-Lasting Sodium Rechargeable Batteries
Author(s)
Hyungsub Kim; Gabin Yoon; Inchul Park; Hong, J; Park, KY; Kim, J; Lee, KS; Sung, NE; Lee, S; Kisuk Kang
Publication Date
2016-10
Journal
CHEMISTRY OF MATERIALS, v.28, no.20, pp.7241 - 7249
Publisher
AMER CHEMICAL SOC
Abstract
The development of long-lasting and low-cost rechargeable batteries lies at the heart of the success of large-scale energy storage systems for various applications. Here, we introduce Fe- and Mn-based Na rechargeable battery cathodes that can stably cycle more than 3000 times. The new cathode is based on the solid-solution phases of Na4MnxFe3-x(PO4)(2)-(P2O7) (x = 1 or 2) that we successfully synthesized for the first time. Electrochemical analysis and ex situ structural investigation reveal that the electrodes operate via a one phase reaction upon charging and discharging with a remarkably low volume change of 2.1% for Na4MnFe2(PO4)(P2O7), which is one of the lowest values among Na battery cathodes reported thus far. With merits including an open framework structure and a small volume change, a stable cycle performance up to 3000 cycles can be achieved at 1C and room temperature, and almost 70% of the capacity at C/20 can be obtained at 20C. We believe that these materials are strong competitors for large-scale Na-ion battery cathodes based on their low costs, long-term cycle stability, and high energy density. © 2016 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/3105
ISSN
0897-4756
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
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